Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab411dad7c9c3de2…

MALICIOUS

PDF

85.5 KB Created: 2021-06-27 14:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 33695685a50100c802f43c906aa4f6e9 SHA-1: f750be2efbf505d0be6cc4b641cabb655d6ff378 SHA-256: ab411dad7c9c3de2a63c01aaa738f8442c9a108415ea0334ceee1bc7072f0ea6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging a technique often associated with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://chcial.ru/uplcv?utm_term=newlands+and+mendeleev+periodic+table PDF link annotation
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/06045859cd12c510e799cc97b3818ac4/57332311875.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/91150071476493a55c9fd6034476f63b/37670396245.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/matuzoxa.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/wumarerulikilasag.pdfIn PDF document text
    • https://ancoraeducacion.com/images/jegomukixazadabusavoner.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/3d7fb7bf2cc5c263bef16d57eb5bf42b/55882185838.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/kojufogobew.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/63422639827.pdfIn PDF document text
    • http://geose.ru/userfiles/file/32682427593.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/9ba85b70bc784b49cdde3a2cfb05b872/26666719832.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/ba7082bd8795179170b96b5ca52d02f0/84848161723.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf9e386506---7637428161.pdfIn PDF document text
    • http://18554080.com/userfiles/file/torujajufinokefezonofeja.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/11484475194.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/gegoparok.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b520a36424a---42184861320.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/91919889884.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2df461a61---47102123485.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87db3b6c74---futebuvudeg.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/dodabejukolasezepez.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/01jr32642s45pfgbdonm193j22/80002058561.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/9965697251.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/84619590433.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001020d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020D 16888 bytes
SHA-256: 4baed129204ecda657279ef78d57578f565169c8ea0be2cb7ee3ea722de42cda
font_02_sfnt_off00012dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEC 10944 bytes
SHA-256: 096c10f890752d9fa25b10b43a3d68d9f38ee917e1dc383cef19bec7fc6048f5

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